SYNOPSIS:
    spline: a structure storing a 3D cubic spline forming a flexible
            smooth patch that can be used to approximate surfaces.

DESCRIPTION:
    Eccet can embed cubic 3-dimensional spline surfaces in its rendered
    output.

    Splines have lots of rendering options like showing as wireframe,
    flat or shaded. See SPLINE_VISFLAGS for details on this.

    Splines live in the global coordinate system and can be moved,
    turned, scaled and bent as the user wishes. They can be copied
    into the volume, e.g. to serve as a template.

SEE ALSO:
    SPLINE_ADD, SPLINE_DEL, SPLINE_VISFLAGS
    coordinate
